Battle Arena (専用部屋, Private Room) is an online mode that allows players to battle with each other in an arena. Arenas allow a large amount of customization, including most of the rules from Smash and some exclusive to Battle Arenas. A Battle Arena room can hold up to 8 players with the matches supporting up to 4 players depending on the settings the Battle Arena creator selected.
When joined, players will be represented by tokens displaying the character the player has chosen for their Smash tag. The tokens can be moved by the player to place them into the ring for the upcoming match (if there is space), the waiting line for the next match, or the spectating stands to spectate. Players also have the option of choosing the fighter and preferred stage (if enabled), however doing so will force their token out of the ring, line, or stands, making them rejoin after making their selection. As of Version 6.0.0, players can press the right shoulder button or trigger to open a message menu, which they can use to send pre-written messages to other players.
Matches are started when any of the players in the ring presses start. All of the players will then have 15 seconds to press the join button to ready-up, or holding the special button to back-out. Any players that back-out or do not ready in the 15 seconds will be put in the back of the line, allowing other players into the ring. Once every player has readied-up the match will start with any player in the waiting line or spectator stands watching that match; if a player was not in line or the stands they will not be able to spectate. At the end of the match the player placements are shown to everyone in the arena and players are rotated out based on the arena settings.
Battle Arenas created by friends are visible on their friend lists, regardless if the arena is set to 'Public' or 'Friends'. People who aren't registered as friends can still join other player's Battle Arenas, however they would need to search for the Arena ID.
Creating an Arena
Creating an arena will present the player with the following options:
These settings tend to control either the core match style or don't impact gameplay.
Joining an Arena
To join an existing arena, players have 3 options: